Debugging
Quick answer
The debugger can change data, so use it carefully, especially in production (where debug/change authorization is tightly controlled).
Key takeaways
- You start the debugger by setting a breakpoint (in the editor, or /h in the command field before running a transaction).
- A key skill is knowing where to break.
- Breakpoints: line, and powerful conditional/statement/exception breakpoints (e.g. break when a specific message is issued or an…
- Watch out: Stepping blindly instead of breaking on the message/exception.
The ABAP debugger
You start the debugger by setting a breakpoint (in the editor, or /h in the command field before running a transaction). It then lets you step through the code line by line, watch variables and internal tables, inspect the call stack, and even change values on the fly to test scenarios.
Debugging techniques
- Breakpoints: line, and powerful conditional/statement/exception breakpoints (e.g. break when a specific message is issued or an exception is raised).
- Watchpoints: break when a variable’s value changes.
- Step / step over / return: control execution granularity.
- Layers: debug across RFC and background steps.
Finding the right place to break
A key skill is knowing where to break. Techniques include setting a breakpoint on a message (to catch where an error is raised), on an exception class, or on a statement like a specific function call. This gets you to the problem without stepping through thousands of lines.
Debugging responsibly
The debugger can change data, so use it carefully, especially in production (where debug/change authorization is tightly controlled). Non-production is the place to experiment. Reading dumps (ST22) often complements debugging by showing exactly where and why code failed.
Common pitfalls
- Stepping blindly instead of breaking on the message/exception.
- Changing values in production, tightly controlled for good reason.
- Ignoring ST22 dumps that pinpoint failures.
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Check your understanding
Which statement is true of Debugging?
- A. Troubleshooting FI focuses on the recurring issues in financial postings and processes, posting errors…
- B. ME22N is the SAP transaction code for Change Purchase Order (MM).
- C. It then lets you step through the code line by line, watch variables and internal tables, inspect the call…
Show answer
C. It then lets you step through the code line by line, watch variables and internal tables, inspect the call…
Covered in the “The ABAP debugger” section of this lesson.
Which of these also applies to Debugging?
- A. A key skill is knowing where to break.
- B. Guessing instead of using the reference tools.
- C. Choosing SOAP for new lightweight integrations (prefer OData).
Show answer
A. A key skill is knowing where to break.
Covered in the “Finding the right place to break” section of this lesson.
Which part of the Learn SAP curriculum covers Debugging?
- A. SAP glossary
- B. SAP ABAP development
- C. SAP administration
Show answer
B. SAP ABAP development
This lesson sits in the SAP ABAP development section of the Learn SAP course.